A belated discovery, one that causes considerable anguish, is that no one can persuade another to change. Each of us guards a gate of change that can only be unlocked from the inside. We cannot open the gate of another, either by argument or emotional appeal.

Marilyn Ferguson
Marilyn Ferguson (1938-2008) American author, editor, public speaker
The Aquarian Conspiracy, ch. 4 (1980)
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